advapi32: Remove wrong "is NULL and error out" code (coccicheck).

dlls/advapi32/crypt.c

@@ -1420,11 +1420,6 @@ BOOL WINAPI CryptGenKey (HCRYPTPROV hProv, ALG_ID Algid, DWORD dwFlags, HCRYPTKE
 
 	TRACE("(0x%lx, %d, %08x, %p)\n", hProv, Algid, dwFlags, phKey);
 
-	if (!prov)
-	{
-		SetLastError(ERROR_INVALID_HANDLE);
-		return FALSE;
-	}
 	if (!phKey || !prov || prov->dwMagic != MAGIC_CRYPTPROV)
 	{
 		SetLastError(ERROR_INVALID_PARAMETER);

dlls/advapi32/tests/crypt.c

@@ -238,6 +238,9 @@ static void test_incorrect_api_usage(void)
     if (!result) return;
     pCryptDestroyHash(hHash);
 
+    result = pCryptGenKey(0, CALG_RC4, 0, &hKey);
+    ok (!result && GetLastError() == ERROR_INVALID_PARAMETER, "%d\n", GetLastError());
+
     result = pCryptGenKey(hProv, CALG_RC4, 0, &hKey);
     ok (result, "%d\n", GetLastError());
     if (!result) return;